boulder, colorado, has destroyed at least 135 home. it's the most destructive fire in state history. and it's only about 10% contained. now, diane sawyer, with a preview of tonight's "world news." diane? >> hello. it's thursday. great to talk to you, juju. and tonight, on "world news," what if a brilliant man, whose office is in a closet, could make your child smarter for life with what he does? bill gates thinks so. a lot of people do. and it's all free. see who he does tonight on "world news." >> i'll check that out. and finally, who makes the best fast-foodburg center well, a "consumer reports" online survey has growned in-n-out burger and five guys has the best in the nation. followed by fudruckers. and mcdonald's finished last. i know. controversial, right, sam? mcdonald's. they say they sell more of their burgers, even if they're ranked fifth. juju, take a look in the monitor.